docs: add script to help working on the compiler

[charles-cooper]

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[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (4dd47e3) 89.61% compared to head (e0721c0) 90.17%.
Report is 2 commits behind head on master.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3674      +/-   ##
==========================================
+ Coverage   89.61%   90.17%   +0.56%     
==========================================
  Files          80       79       -1     
  Lines       11343    11261      -82     
  Branches     2553     2545       -8     
==========================================
- Hits        10165    10155      -10     
+ Misses        791      717      -74     
- Partials      387      389       +2     

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